Image. The energy levels of an atom are shown. Which labeled transition emits a photon of wavelength 124.1 nm? Take h = 6.62 × 10⁻³⁴ J s.
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Question

Image. The energy levels of an atom are shown. Which labeled transition emits a photon of wavelength 124.1 nm? Take h = 6.62 × 10⁻³⁴ J s.

G1 Physics · Accepted Answer

Step 1: For a hydrogen-like atom, Eₙ = −13.6Z²/n² eV and photon energy is ΔE = 13.6Z²|1/n₂²−1/n₁²| = hc/λ. Step 2: Use the stated transition/excitation condition to obtain the required value. Final: D: Transition D.